Daniel mcfarlan moore



(No Model.)

D. M015. MOORE. ELECTRIC LAMP REGULATOR.

Patented May 24, 1898.

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UNrTnn STaTns aTnNT Orrrcnl DANIEL MOEARLAN MOORE, OF NEW YORK, N. Y., ASSIGNOR TO THE MOORE ELECTRICAL COMPANY, OF SAME PLACE ELECTRlC LAii/lp REGULATOR.

SPECIFICATION forming part Of Letters Patent N0. 604,680, dated May 24:, 1898.

Application filed October l3,1894=. $erial No. 525,787. (No model.)

To all whom it may concern:

Be it known that I, DANIEL MOFARLAN lVIOORE, a citizen of the United States of America, and a resident of New York city, in the county and State of New York, have invented certain new and useful Improvements in Incandescent Electric-Lamp Regulators, of which the following is a specification.

Heretofore I have been granted Patents No. 494,531, of March 28, 1893, and No. 502,444, of August 1, 1893.

The invention in this application relates to improvements upon inventions set forth in the above-named patents.

The object of the invention in general is to produce incandescence of a carbon filament.

by a rapid succession of practically infinitesimally short electrical impulses, and then to vary the intensity of the light by changing the rate of the occurrence of the impulses or the energy thereof, or both, it being the basis of the present invention to effect the interruptions of current in an evacuated and hermetically-sealed glass bulb.

The nature of the invention in detail is set forth hereinafter by a description of the accompanying drawings.

Figure 1 is a vertical section of the com plete device embodying my invention drawn to twice the scale. Fig. 2 is an inverted plan of the device in Fig. 1'. -Fig. 3 is a plan view of the view shown in Fig. 1, while Fig. 4 is an interior view showing some details not clearly brought out in other figures.

3 5 The device embodying the invention consists of the combination of a lamp-socket a, carrying a magnet 1), whose armature is c, the same being elastically supported in an eX- hausted and hermetically-sealed glass bulb d,

which is carried by a slightly-flexible and adjustable arm 6, having two parallel arms 6, in which the bulb is permanently mounted; a screw f, having a handle f, adapted to feed toward the lever e and mounted in an insu- 5 lated manner from the socket-frame g of the lamp-socket, and an adjustable insulator-h, mounted on the base and also adapted to hold the lever c in the manner of an adjustable stop during its motion away from the magnet I); the elastic support of the armature c, being the terminal 'i, which is normally in contact with the opposite terminal 2" at a point within the bulb, and a short-circuiting terminal j, mounted in the path of the lever c,which has the function of an electric conductor con- 5 5 necting with a spring-terminal t.

The remaining details of the device in so far as the invention is at all concerned are as follows:

Theinsulator h is attached to the base by a screw 7c, which is adapted to hold the same against the lever e, and thereby to maintain the armature 0 within inductive relation to the magnet 19.

The circuit through the lamp may be traced as follows: from the plus sign to the bindingpost l, to the bushing m, to the adjustable screw f, toLthe lever c, to the spring-terminal t, to the opposite terminal t, to the magnet 17, to the socket-terminal n, to the filament n, to the socket-shell a at the point a, to the contact Z, and out of the socket at the minus sign.

From one end of the magnet is aconductor 0, connecting with the short-circuit terminal j, so that if the lever e is moved far enough to touch the terminal j the current will be shunted around the magnet Z). The magnet 12 is held permanently to the base 9 by means of the screw 1) entering the core of the magnet.

The operation of the device is as follows: By turning the handle f, so as to cause the screw f to move toward and touch the lever e, the current is closed through the magnet and through the socket or lamp, so that the magnet attracts the armature c and breaks the current at the contact of the terminals 01 and 2', whereby the armature moves back again on account of the elasticity of the terminal 11 until the terminal is closed again at the terminals in the vacuum, so that the. same operation is repeated so rapidly that the light from the lamp is, as far as the eye can detect,

a continuous light, which may be extinguished by unscrewing the screw f in the opposite di- 5 rection until the lever e rests against the insulating-stop h and yet within inductive action of the magnet 17. If, while the screw f is in contact with the lever c, it is further moved toward the magnet 19, it is evident that the light of the lamp will be varied, so that for all of the different positions of the lever c between that in which it touches the insulator 7a or the short-circuit terminal j the lamplight may be varied to all intensities from about mere visibility to the maximum.

Instead of the vacuum the bulb may contain a rarefied inert atmosphere, as nitrogen.

I claim as my inVention- 1. The combination with the base of an incandescent electric-lamp socket, of an electromagnet, a bulb having a vacuum or inert atmosphere, a vibratory armature within the vacuum Within inductive relation to the magnet, a flexible arm carrying the bulb and movable to and from the magnet, an insulating-stop for limiting the movement of the bulb from the magnet, a screw provided with a handle passing through the socket-frame and movable to and from and against the said arm, and electric contacts Within the bulb and controlled by the armature, the electric circuit being from one terminal of the lamp to the other and passing through the said screw, the said arm, the said contacts and the said magnet.

2. The combination with the base of an incandescent electric lamp, of an electromagnet, a bulb having a vacuum within inductive relation to the magnet, a flexible arm, carrying the bulb and movable to and from the mag not, an insulating-stop for limiting the move ment of the bulb from the magnet, a screw provided With a handle passing through the frame of the socket and movable to and from and against said arm, and electric contacts Within the bulb and controlled by the armature, andashort-circuiting electric conductor in the path of the arm 6, for the purpose as set forth, of short-circuiting the said contacts and the magnet.

3. The combination with an incandescent lamp, of an electroinagnet in the socket there of and in the lamp-circuit, a vacuous chamber Within said socket, circuit-interrupting contacts Within said chamber and in circuit with the lamp-filament, and an armature attached to one of said contacts and actuated by said magnet.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 12th day of October, 1894:.

D. MCFARLAN MOORE.

Witnesses:

EDWARD I. THOMPSON, ROBERT S. Ormrrnm. 

